Developer Guide and Reference

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Avoiding Mixed Data Type Arithmetic Expressions

Avoid mixing integer and floating-point (
float, double, or long double
) data in the same computation. Expressing all numbers in a floating-point arithmetic expression (assignment statement) as floating-point values eliminates the need to convert data between fixed and floating-point formats. Expressing all numbers in an integer arithmetic expression as integer values also achieves this. This improves run-time performance.
For example, assuming that
I
and
J
are both
int
variables, expressing a constant number (2.0) as an integer value (2) eliminates the need to convert the data. The following examples demonstrate inefficient and efficient code.
Examples
Inefficient Code Example
int I, J; I = J / 2.0 ;
Efficient Code Example
int I, J; I = J / 2;